Revised temperatures for two benchmark M-dwarfs – outliers no more
Abstract Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing binaries from Kepler/K2: KIC 1571511AB and HD 24465AB. Both have temperatures reported to be hotter or colder by ≈1000 K in comparison w...
Saved in:
Published in | Monthly notices of the Royal Astronomical Society |
---|---|
Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
21.10.2024
|
Online Access | Get full text |
Cover
Loading…
Summary: | Abstract Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing binaries from Kepler/K2: KIC 1571511AB and HD 24465AB. Both have temperatures reported to be hotter or colder by ≈1000 K in comparison with both models and the majority of other M-dwarfs in the literature. By modelling the secondary eclipses with both the original data and new data from TESS we derive significantly different temperatures: 2865 ± 27 for KIC 1571511B and 3081 ± 32 for HD 24465B from TESS and 3114 ± 32 K for HD 24465B from K2. These new temperatures are not outliers. Removing this discrepancy allows these M-dwarfs to be truly benchmarks. Our work also provides relief to stellar modellers. We encourage more measurements of M-dwarf effective temperatures with robust methods. |
---|---|
ISSN: | 0035-8711 1365-2966 |
DOI: | 10.1093/mnras/stae2266 |